The ASP D1 Defender Heat (OC) Insert Twin Pak (ASP part no. 54912) puts two active replacement inserts in one package for the Metro D1 and Sport D1 Defenders. ASP sold this insert under the Palm Defender name before the rename. Buying two at once means a spare is ready the day the first one reaches its date code or has been used. For anyone who carries a Defender every day, it is the practical way to keep the device loaded without a gap.

Key Specifications

• The insert is compatible with Metro D1 and Sport D1 Defenders, the two ASP models that use this size.
• The pack contains two Heat (OC) inserts, so one replacement is always on the shelf.
• The Heat formulation is 10% oleoresin capsicum with 1.4% major capsaicinoids, rated by ASP at two million Scoville Heat Units.
• Each insert holds approximately six half-second bursts, enough to practice the activation sequence or cover a real discharge.
• Each insert is machined from aerospace aluminum and solid brass and has a specially produced valve system and patented dispensing mechanism.
• Each Heat insert is date-coded, and ASP says to replace it once the marked date has passed.

Frequently Asked Questions

How many inserts come in the Twin Pak? Two Heat (OC) inserts, both active.

Will it fit a Palm Defender? Yes. ASP renamed the Palm Defender to Metro D1, and this insert is made for the Metro D1 and Sport D1 Defenders.

Is there a way to practice with the Defender first? ASP offers inert Test inserts for practice and function testing, sold separately from this Heat Twin Pak.

Buy the ASP D1 Defender Heat (OC) Insert, Twin Pak

It ships from our Lubbock, Texas gun shop with fast, insured delivery, and you can find more pepper spray in the same section.